Permeation of hydrogen through pre-oxidized Pd membranes in the presence and absence of CO

Wang, D; Flanagan, Ted B.; Shanahan, Kirk L.

doi:10.1016/j.jallcom.2003.09.150

Cited by 60 publications

(27 citation statements)

References 16 publications

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“…Both Amano et al [7] and Wang et al [9] have found that the effect of CO is much greater at lower temperatures. Sakamoto et al [10] find that the hydrogen permeability in Pd-Y(Gd)-Ag and Pd-Y-In(Sn,Pb) alloy series decrease with time due to the adsorption of the CO on the surfaces.…”

Section: Introductionmentioning

confidence: 95%

“…[6] it states that "Huber found in a study with carbon monoxide that it blocks the hydrogen passage through the gas/metal interface by strong chemisorption". Although the poisoning mechanism of CO on Pd and its alloy membranes has been studied by many researchers [7][8][9][10][11][12], it is still on dispute.…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers [7][8][9][10] consider that CO inhibits the hydrogen permeation through Pd and its alloy membranes because it occupies sites for H 2 adsorption and dissociation. Both Amano et al [7] and Wang et al [9] have found that the effect of CO is much greater at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

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The poisoning of Pd–Y alloy membranes by carbon monoxide

Peng

Rao

Luo

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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The poisoning of Pd–Y alloy membranes by carbon monoxide

Peng

Rao

Luo

et al. 2009

Journal of Alloys and Compounds

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“…They observed that H 2 O resulted in a more dramatic decrease in H 2 permeance at 548 K, 70%, compared to the 10% and 40% decreases caused by CO 2 and CO, respectively. Wang et al [16] studied H 2 permeation through pre-oxidized Pd membranes. An approximately 75% reduction of H 2 permeance for a 200 lm thick Pd membrane was associated with CO at 373 K, with this effect decreasing with temperature.…”

Section: Introductionmentioning

confidence: 99%

The Effects of H2O, CO and CO2 on the H2 Permeance and Surface Characteristics of 1 mm Thick Pd80wt%Cu Membranes

Iyoha

Howard²,

Morreale³

et al. 2008

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The hydrogen permeance of 1 mm-thick Pd 80wt% Cu foils was measured in the presence of equimolar mixtures of H 2 with CO, CO 2 or H 2 O over the temperature and total pressure ranges of 623-1,173 K and 0.62-2.86 MPa, respectively. In all cases, permeance losses at 623 and 738 K were very modest. At higher temperatures, more significant decreases in membrane permeance were observed with the highest reduction of about 50% occurring when macroscopic carbon deposition occurred on the membrane surface during H 2 -CO exposure at 908 K. The more worrisome effects of exposure to these gases, however, were the micron-scale surface defects observed at 908 and 1,038 K. Although the 1 mm thick disk membranes retained their mechanical integrity, such defects could cause catastrophic failure of ultra-thin, Pd-Cu membranes (1-5 lm thick) deposited on porous substrates.

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“…The use of an ultrahigh vacuum apparatus is one of them, which allows measurements at the low pressure and temperature and the use of thin foils, as mentioned in a previous paper [6]. Furthermore, the influence of surface contamination by gases and of surface as well as internal oxidation on the hydrogen permeation have been studied recently [7][8][9].…”

Section: Introductionmentioning

confidence: 99%